Leases (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ 2,791,000
Lease, Expense	4,400,000	$ 3,000,000.0
Operating Lease, Right-of-Use Asset	$ 38,760,000		$ 40,551,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 3 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	5.00%
Finance leases - right of use asset	$ 1,007,000		1,299,000
Lease, Right-of-Use Asset	39,767,000		41,850,000
Operating Lease, Liability, Current	(7,968,000)		(7,663,000)
Finance Lease, Liability, Current			(124,000)
Operating Lease, Liability, Noncurrent	41,486,000		44,015,000
Finance Lease, Liability, Noncurrent	0		54,000
Lease, Liability	49,602,000		$ 51,856,000
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	562,000
Accrued Liabilities [Member]
Lessee, Lease, Description [Line Items]
Finance Lease, Liability, Current	$ (148,000)